Efecto de la atmósfera de calcinación en la modificación de SBA-15 con nitrato férrico por impregnación húmeda
Date
2018
Journal Title
Journal ISSN
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Abstract
En este trabajo se modificaron materiales SBA-15 con hierro por un método sencillo y económico
conocido como impregnación húmeda, haciendo énfasis en las condiciones de calcinación. Se
observó que este paso final es especialmente influyente en las nanoespecies formadas dentro de
los mesocanales y sobre la superficie externa. La estructura regular de estos materiales fue
verificada por DRX a bajo ángulo, TEM e isotermas de adsorción de N2 mientras que las
nanoespecies de hierro formadas se analizaron por UV-Vis RD y TPR. Los primeros resultados
indicarían que tanto el tamaño como la estructura cristalina se ven modificados y por ende sus
propiedades catalíticas, adsorbentes y magnéticas deberán ser estudiadas.
In this work SBA-15 materials were modified with iron by a simple and economical method known as wet impregnation. Emphasizing about the influence of the temperature and the atmosphere used in the final calcination step. It is observed that this final step has a special influence in the nanospecies formed within the mesochanels and on the external surface. The regular structure of these materials was verified by XRD at low angle, TEM and N2 adsorption isotherms while the iron nanospecies formed were analyzed by UV-Vis RD and TPR and magnetization curves M vs H. The first results would indicate that both, size and crystalline structure, are affected and therefore their catalytic, adsorptive and magnetic properties should be studied.
In this work SBA-15 materials were modified with iron by a simple and economical method known as wet impregnation. Emphasizing about the influence of the temperature and the atmosphere used in the final calcination step. It is observed that this final step has a special influence in the nanospecies formed within the mesochanels and on the external surface. The regular structure of these materials was verified by XRD at low angle, TEM and N2 adsorption isotherms while the iron nanospecies formed were analyzed by UV-Vis RD and TPR and magnetization curves M vs H. The first results would indicate that both, size and crystalline structure, are affected and therefore their catalytic, adsorptive and magnetic properties should be studied.
Description
Keywords
Impregnación húmeda, Nanoespecies, Fe/SBA-15
Citation
1º Congreso Latinoamericano y 3ª Congreso Argentino del Programa de Procesos y Productos
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